Reaction product of aqueous copolymer emulsion and polyvalent metal compound and polishing composition containing same

Abstract

A reaction product of (I) an aqueous emulsion of a copolymer of (a) 5-50 wt % of an ethylenically unsaturated carboxylic acid monomer and/or the salt thereof, (b) 0.05-20 wt % of ethylenically unsaturated sulfonic acid monomer and/or the salt thereof, and (c) other ethylenically unsaturated monomers polymerizable with the monomers (a) and (b), provided that the total of monomers (a), (b), and (c) is 100 wt %, the copolymer having a Tg from −30° C. to +20° C., and (II) a polyvalent metal compound. The reaction product is useful as a floor polish excelling in durability, adhesion to substrates, and recoatability that are well balanced with removability with an alkali, and decreased TVOC due to absence or low content of a low boiling point coalescent agent and plasticizer.

What is claimed is:  
     
         1 . A reaction product of (I) an aqueous emulsion of a copolymer of (a) 5-50 wt % of an ethylenically unsaturated carboxylic acid monomer and/or the salt thereof, (b) 0.05-20 wt % of ethylenically unsaturated sulfonic acid monomer and/or the salt thereof, and (c) other ethylenically unsaturated monomers polymerizable with the monomers (a) and (b), provided that the total of monomers (a), (b), and (c) is 100 wt %, the copolymer having a glass transition temperature from −30° C. to +20° C., and (II) a polyvalent metal compound.  
     
     
         2 . The reaction product according to  claim 1 , wherein the glass transition temperature of the copolymer is from −20° C. to +20° C.  
     
     
         3 . The reaction product according to  claim 1 , wherein the polyvalent metal compound is selected from the group consisting of oxides, hydroxides, carbonates, acetates, hypophosphates, phosphates, and sulfates of calcium, magnesium, zinc, aluminum, tin, tungsten, and zirconium.  
     
     
         4 . The reaction product according to  claim 1 , wherein the polyvalent metal compound is selected from the group consisting of calcium hydroxide, calcium acetate, calcium hypophosphate, calcium phosphate, zinc oxide, zinc hydroxide, zinc carbonate, and zinc sulfate.  
     
     
         5 . A polishing composition comprising a reaction product of (I) an aqueous emulsion of a copolymer of (a) 5-50 wt % of an ethylenically unsaturated carboxylic acid monomer and/or the salt thereof, (b) 0.05-20 wt % of ethylenically unsaturated sulfonic acid monomer and/or the salt thereof, and (c) other ethylenically unsaturated monomers polymerizable with the monomers (a) and (b), provided that the total of monomers (a), (b), and (c) is 100 wt %, the copolymer having a glass transition temperature from −30° C. to +20° C., and (II) a polyvalent metal compound.  
     
     
         6 . The polishing composition according to  claim 5 , further comprising one or more components selected from the group consisting of other resin emulsion, rubber emulsion, alkali-soluble resin, wax emulsion, coalescent agent, plasticizer, wetting agent, dispersant, leveling agent, and antiseptic agent.  
     
     
         7 . The polishing composition according to  claim 6 , wherein other resin emulsion is an emulsion of an acrylic resin having a glass transition temperature from −30° C. to +70° C.  
     
     
         8 . The polishing composition according to  claim 7 , wherein the acrylic resin is a copolymer comprising at least one alkyl (meth) acrylate selected from the group consisting of methyl methacrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, t-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and cyclohexyl (meth)acrylate.